linux-kernel - Re: [REGRESSION] 5.8-rc3: seccomp crash with Chromium, QtWebEngine and related browsers: seccomp-bpf failure in syscall 0072

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Message-ID: <202006290739.8AB49B15@keescook>
Date:   Mon, 29 Jun 2020 07:41:56 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Martin Steigerwald <martin@...htvoll.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...capital.net>,
        Will Drewry <wad@...omium.org>,
        Mel Gorman <mgorman@...hsingularity.net>
Subject: Re: [REGRESSION] 5.8-rc3: seccomp crash with Chromium, QtWebEngine
 and related browsers: seccomp-bpf failure in syscall 0072

On Mon, Jun 29, 2020 at 11:08:10AM +0200, Martin Steigerwald wrote:
> Dear Andy, Kees, Will, dear kernel community,
> 
> With 5.8-rc3 there is a seccomp related crash which prevents Chromium and
> QtWebEngine from starting:
> 
> Bug 208369 - seccomp crash with Chromium, QtWebEngine and related browsers: seccomp-bpf failure in syscall 0072
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=208369
> 
> Reverting to 5.8-rc2 fixes the issue.

Hi,

It looks like this is from e9c15badbb7b ("fs: Do not check if there is a
fsnotify watcher on pseudo inodes")

Currently being discussed here:
https://lore.kernel.org/lkml/7b4aa1e985007c6d582fffe5e8435f8153e28e0f.camel@redhat.com/#r

-- 
Kees Cook